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https://issues.apache.org/jira/browse/HDFS-14981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16972640#comment-16972640
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Wei-Chiu Chuang commented on HDFS-14981:
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I think this is done by HDFS-6860.
> BlockStateChange logging is exceedingly verbose
> -----------------------------------------------
>
> Key: HDFS-14981
> URL: https://issues.apache.org/jira/browse/HDFS-14981
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: logging
> Reporter: Nick Dimiduk
> Priority: Major
>
> On a moderately loaded cluster, name node logs are flooded with entries of
> {{INFO BlockStateChange...}}, to the tune of ~30 lines per millisecond. This
> provides operators with little to no usable information. I suggest reducing
> this log message to {{DEBUG}}. Perhaps this information (and other logging
> related to it) should be directed to a dedicated block-audit.log file that
> can be queried, rotated on a separate schedule from the log of the main
> process.
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